Oyster dredge hoist gear



Aug. 18, 1953 A. MAZZELLA 2,648,918

OYSTER DREDGE HOIST GEAR Filed Dec. 15, 1950 5 Sheets-Sheet 1 INVENTOR. airman 7J0 fl faz zeZZa,

ATTDRN EYS Aug. 18, 1953 A. MAZZELLA OYSTER DREDGE HOIST GEAR 5 Sheets-Sheet 2 Filed Dec. 15, 1950 INVENIOR. flnZon o .Maz zeZZa/ ATTD RNEYS 1953 A. MAZZELLA 2,648,918

OYSTER DREDGE HOIST GEAR 5 Sheets$heet 5 Filed D80. 15, 1950 INVENTOR. 'flnonzo .l fazzella/ ATTO RN EYS Aug. 18, 1953 A. MAZZELLA 2,648,918

OYSTER DREDGE HOIST GEAR Filed Dec. 15, 1950 5 Sheets-Sheet 4 I INVENTOR.

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ATTEI RN EYS Patented Aug. 18, 1953 UNITED STATES PATENT OFFICE OYSTER DREDGE HOIST GEAR Antonio Mazzella, New Haven, Conn.

Application December 15, 1950, Serial No. 201,035

2 Claims. (CI. 37-55) This invention relates to oyster and clam dredge hoisting gear used on oyster boats or dredges, and in particular a pair of booms pivotally mounted through universal joints on a head block on the deck of a boat with the booms supported intermediate of the length thereof by auxiliary booms and with the ends of the booms positioned to travel upwardly and inwardly whereby oysters and the like carried by dredges suspended from the ends of the booms by cables trained over pulleys in the ends of the booms and actuated by a Windlass or engine, may be dumped upon receiving trays on the deck of a boat upon which the gear is mounted.

The purpose of this invention is to provide hoisting equipment for drawing oyster and clam dredges inwardly in which the dredges are elevated to positions above the deck of a boat by which they are carried and in which the dredges are drawn inwardly to positions over the deck as they are elevated.

Various devices have been provided for recovering oyster and clam dredges but where the dredges are elevated and at the same time drawn inwardly comparatively heavy and elaborate machinery and equipment is required and the upkeep thereof is costly. With this thought in mind this invention contemplates a comparatively simple super-structure mounted on the hull of a boat wherein with oyster and clam dredges suspended from the ends of booms by cables the booms are actuated by the cables to elevate the dredges and at the same time carry the dredges inwardly to positions above the deck of the boat as the dredges are recovered.

The object of this invention is, therefore, to improve and simplify the construction of oyster and clam dredge recovering equipment whereby dredges suspended at the sides of a boat may be drawn in and elevated by a single hoisting engine and dumped by tripping a hand operating lever.

Another object of the invention is to provide structure for clam dredge reclaiming and hoisting gear that may be constructed with beams, pulleys, cables and the like that are now available on the market.

Another object of the invention is to provide a dredge for scooping oysters in the bottom. of the sea in which the oysters are scooped with the dredge in a horizontal position and dumped with the dredge in a vertical position. I

A further object of the invention is to provide structure for clam dredge hoisting gear that may readily be incorporated in a boat in which the 2 gear is of simple and economical construction. With these and other. objects and advantages in view, the invention embodies a pair of booms pivotally mounted on a boat, auxiliary booms extended upwardly from the deck of the boat and by which the booms are supported, a tubular mast, and cables extended from dredges through pulleys in the ends of the booms and downwardly through the mast to hoisting equipment in the hull of the craft.

Other features and advantages of the invention will appear from the following description taken in connection with the drawings wherein:

Figure 1 is a view showing a side elevation of.v

mounted thereon and with the gear illustratedv in the dredging position.

Figure 2 is a similar view showing one of the dredges in the dumping position.

Figure 3 is a plan view of the dredge illustrated in Figure l.

Figure 4 is a front elevational view of the dredge shown in Figures 1 and 2 showing the gear in the position in which thedredges are operating, and with one of the dredges omitted.

Figure 5 is a similar view showing the gear with the dredges in the unloading position.

Figure 6 is a detail showing a plan view of an end of one of the boomsillustrating the pulleys therein.

Figure 7 is a similar detail looking toward one side of the boom.

Figure 8 is also a similar detail showing a bail of one of the dredges entering notches in an end of one of the booms.

Figure 9 is a plan view showing one of the dredges in the scooping position and with the door indicated in dotted lines.

Figure 10 is an end elevational view of the dredge as shown in Figure 9.

Figure 11 is a similar view showing a longi-.

tudinal section through the dredge being taken on line ll-H of Figure 9.

Figure 12 is a cross section taken on line 12-42 of Figure 9 showing the segment for actuating the door of the dredge.

Figure 13 is a detail illustrating the latch for retaining the door in the closed position.

Figure 14 is a longitudinal section through the dredge showing the dredge suspended and with the door thereof open. 7

Figure 15 is a cross section through the dredge as shown in Figure 14.

Referring now to the drawings wherein like "reference characters denote corresponding parts the dredge hoisting gear of this invention includes a pair of booms I and H pivotally mounted through universal joints [2 and I3 on a head block M with the boom l0 supported by an auxiliary boom [5 on one side of the boat and the boom I I supported by a similar auxiliary boom It on the opposite side. The upper end of the auxiliary boom [5 is connected to the boom [0 by a universal joint 4 and the lower end is connected by auniversal joint S to-aniupright 6 on the deck of the boat. The auxiliary boom I6 is similarly connected with a universal joint 1 to the boom II and to an upright 8 by a universal joint 9 on the deck of theiboat. {the lower surfaces of the booms are provided with guides IT and if! that are spaced from the 'o'uter The outer ends of the booms are formed as illustrated vin :Figuresfi, v'7 and 8 and each rboomris provided with .rightsangularly disposed-pulleys orsheaves Ill-and whicharejournaledon pins 21 land .22, respectively .with;the pulley :19 posi tioned :between sections L23 and 24 on the booms and the pulley ;2D- :between-.ears.;2.5 and 26.

Thesbooms are controlledaby'cablesll and :23 that extend from dredgesi29 and. Sllzover sheaves 20,:aroundathe sheaves 19in theouter-ends 'oizthe booms and then inwardly over 8113111183 blocks! on :a tubulanmast :32 through which the cables extend downwardly to La windlass .33 positioned in the P111111 of the boat, 'whichsisindicated :by the numeral'3i4.

' Receiving traysu35 4 and. 3B are positioned: on the deck of the boat andthese trays .are connected by hinges 31 and 38 positioned on the :stern ends thereof to -discharge ichutes 39 and :40 also positioned on the-deckiof ithe'boat. ZIhe receiving trays :35 :and .236 :are connected by cables 4| and 42 to the booms with the cablesconnecited at :points 4.3 and '14, trained over :pulleys .45 and 416, :respectively, on La crossi'bar or bridle -.-'4l, and extended around sheaves 48 :and 4.9 onithedeck of the :boat. With the cablesconnectediin :this manner the receiving .trays will be elevated, as shown in Figure 2 when the lbooms are actuated to the unloading positions. The :receiving trays are, ithere'fore, elevated by the booms :to receive oysters from the dredges and are ithen dropped downwardly onto-the chutes as ,the dredges are lowered to pick up another iIOQXL The-discharge chutes=39 and tw are supportedon cross beams :56 land at .as illustrated :iniEigure 2.

A platform 52 is provided on the mast32Ifor aid-operator so 'thatthe idredges may readily be observed 'inall positions. 7

The boat is provided with .a stand @pipe ":53 which has -outl'ets extended .over the achutes through which wateris discharged at 1a pressure suiiiicient tolfiusn off oysters 'on'ithe chutes' whereby the oysters are washed atothedeck-oi the yes sel.

The deck of the boat is provided iwith "blocks 54 and :55 that are positioned to receive the booms, as illustrated in Figure 3 retain ":the booms in the dredging positions. A fram'e 56 is mounted on the upper part of the :mast 'and the ends of the :frame are extended to :engage :the booms @to limit the upward movement thereof .so that the booms will stop with 'the;dredges-.over the receiving trays 35 and 36.

The chutes 39 and 40 are provided with-direetion vanes .51 and 58 which are .pivotally mountedsothat they may beset at diiferent stop frame 55. :the operator stationed on the platform 52 and angles thereby providing means for distributing oysters uniformly over the deck of the boat.

With the parts arranged in this manner the booms I0 and II are lowered and the dredges 29 and 30 are suspended to pick up loads. When the dredges are filled the cables are hauled in by the Windlass or a suitable hoisting engine until the bails Gil and GI of the dredges engage the ends of the booms. The continued upward movementof the c'ablescauses theboom to travel upwardly over 'thedeck whereby the dredges are carried upwardly until the booms engage the The dredges are then opened by the load is deposited on the receiving trays 35 and 36 "with the trays in elevated positions. ,Theroysters slide by gravity into the chutes 39 and 40 and are then flushed off by hydraulic pressure from the outlet pipes of the stand pipe 53. The vanes 57 and 58 are adjusted to evenly distribute the oysters over the deck-ofrthe wessel. After the dredges are dumped the cycle is repeated, the dredges being again lowered by slackening the cables whereby thebooms travel downwardly over :the sides of the boat to the dredging positions.

Thesdredges 2s and 38 being similar, the same reference numerals are applied to both. The dredgeiZQ is providedwitha wall fi l'having'teeth 6.5 :in the forward edge anda similar wall 566 is provided on the opposite sideWiththe-edgescorrnected by end walls '6l.and-6-8,:the intermediate parts of which are providedwith openings '69 land it and the openings are-covered with-wire mesh H and 72, respectively. ,Thebail 6.0 is positioned with :the ends pivotally mounted in openings and T4 of theend;plates El and 68, asshown in Figure :14, the ends being securedin 'theopenings by bolts, nuts, .or other suitable means. The dredge is provided with aiperforated door .15 that is secured at the lower ends by hinges 'lfiiand 'l l and the door :is secured iin;the closed position by a segment 18 that is :pivotally i-mounted by a pin [9 on the wall '66, -1Dh8113lllt6Xl78lldt-5d through the wall and also through a guide =88 that extends over the segment. Thesegment is connected to the door '15 by a cable BI which is connected to thesegment at *the;point- 82 and .to bars 33 and 84 the=oppositeends ofwhich are connected to,

clips '85 and'85 on thedoor.

The segment 18 is provided withla handle 8.8 that is positioned ato snap under a spring latch 89, and the handletB, which is provided withan operating cord 9D is retained in :the latch ibya projection 91 on :a'rod 92 that ispivotallyrmountedinbearings 83 and- 94 on the wall .E.6,.'and:that is provided w'tih .a .lever :95 'by which :it may the manually actuated.

With the parts arranged in this manner the lever 19 5 :is turned :upwardly :to zrelease 'themandle 88 when -;the.dredgeszreachithe dumping position above the receiving trays, as shown in Figure 2. After :the oysters are dumped :from the sdredges the handle 88 are drawn :idownwardl-y "by "the cords 98 .to close .the :doors iwhereby'ithe ihandle's snap under 2the zspringilatches, :in which ithey are held by turnin the levers 95 so that the parts :91'

areextended assshowninsrdiguredfi. V r

emptied by inverting thedredge. r

The; dredges'are formed-ewithsmetal frames :cov

ered with wire :mesh sand the bails :ar'e :pivotally mounted to permit swinging from side to side.

It will be understood that modifications may be made in the design and arrangement of the parts without departing from the spirit of the invention.

What is claimed is:

1. In a dredge hoisting gear, the combination which comprises a boat having a deck, a head block on the forward part of the deck, a mast extended upwardly from the deck of the boat, a pair of booms pivotally mounted through universal joints on the head block of the boat and positioned to extend over the sides of the boat, pulleys in the outer ends of the booms, a pulley block on the mast, a pair of dredges suspended by cables with the cables extended through the pulleys in the ends of the booms, over the pulley block on the mast and downwardly to the interior of the hull of the boat, hinged receiving trays mounted above the deck of the boat, discharge chutes positioned to receive products from the receiving trays, guide means pivotally mounted on the discharge chutes for evenly distributing products over the deck of the boat, cables connecting the receiving trays to the booms for elevating the ends of the receiving trays as the booms are elevated, blocks positioned on the deck of the boat for limiting downward movement of the booms, a stop positioned on the mast for limiting upward movement of the booms, and means for flushing products from the chutes.

2. In a dredge hoisting gear, the combination which comprises a boat having a deck, a head block on the forward part of the deck, a mast extended upwardly from the deck of the boat, a pair of booms pivotally mounted on the head block of the boat and positioned to extend over the sides of the boat, pulleys in the booms, a pulley block on the mast, a pair of dredges suspended by cables with the cables extended through the pulleys in the ends of the booms, over the pulley block on the mast and down wardly to the interior of the hull of the boat, hinged receiving trays mounted above the deck of the boat, discharge chutes positioned to receive products from the receiving trays, guide means pivotally mounted on the discharge chutes for evenly distributing products over the deck of the boat, cables connecting the receiving trays to the booms for elevatin the ends of the receiving trays as the booms are elevated, blocks positioned on the boat for limiting downward movement of the booms, a stop for limiting upward movement of the booms, and means for flushing products from the chutes.

ANTONIO MAZZELLA.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 89,416 Matlick Apr. 27, 1869 141,439 Hornfager et a1 Aug. 5, 1873 546,181 Nielsen Sept. 10, 1895 1,104,154 Stinson July 21, 1914 1,219,371 Butterfield Mar. 13, 1917 2,002,599 Bennett May 28, 1935 2,010,843 Bruce Aug. 13, 1935 

